Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
May 10, 2021
Submitted
June 17, 2021
Operation
Air carrier
Aircraft
N732SW
Make and model
Boeing 7377H4
Aircraft serial
27864
Aircraft time
74,727 hours, 43,976 cycles
Part
Stringer
Condition
Corroded
Location
Bs 536 S26r
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

STR26R HAS CORROSION AT BS536 RBL23 WL152 ; / HFEC INSPECTED TRIMMED EDGE OF DAMAGE CUTOUT PER 737NDT PART 6 51-00-00 PROCEDURE 23. NO CRACKS FOUND.;UPDATED CORROSION MEASUREMENTS; EVALUATED CORROSION ON STRINGER 26 R/H BS 536; FOUND 0.020 REMOVED FROM ORIG 0.045 IN 1'X' AREA; FOUND TO BE OUT OF LIMITS PER SRM 53-00-03-1A-1; USED MICROMETER ID4566A S/N UNKOWN;VERIFIED RECEIPT OF PART; CUTOUT STR SECTION BS 500D +11 -538; STR 26R PER SRM 53-00-03 2R-1.;INSTALLED REPAIR PARTS AT STR-26R BS 500D+6' -540;APPLIED SEALING AROUND REPAIR AND CIC ON REPAIR AREA IAW SRM 53-00-03 REP.1; DWG 143A1215 & 143A3230.;LOCATED AND DRILLED REPAIR PARTS; APPLIED CHEMICAL CONVERSION STR-26 SECTION BS 500D+10' - 540 IAW SRM 53-00-03 REP.1;PERFORMED GVI AND NO ADDITIONAL DAMAGED FOUND;APPLIED PRIMER ON REPAIR PARTS AND REPAIR AREA STR-26R BS 500D+6' -540 IAW SRM 53-00-03 REP.1 AND OK TO INSTALL.;RECEIVED REPAIR PARTS FROM OSS VERIFIED HEAT TREATMENT AND FABRICATION NEW SECTION STR-26R MAT. USED 7075 T6 BARE 0.045' LOT#1451784 RO 824536-SWA IAW SRM 53-00-03 REP.1 DWG.143A3241 BAC5602; HAT SECTION MAT.USED 7075 T6 CLAD 0.050'LOT#1407037-1 RO 824537-SWA IAW SRM 53-00-03 REP.1 AND BAC 5602.;REMOVED DAMGED SECTION OF STR-26R AND INSTALLED NEW STR-26R SECTION AND SPLICE AT BS 500D+6'' - 540 IAW SRM 53-00-03 REP. 1

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